The third party doctrine is such bullshit. People have a (human) right to privacy in their homes. Banks don't get to say the money you put in one of their accounts is "theirs" do they? Why would you not benefit from the same kind of protection for your data?

Law enforcement has managed to convince some judges at the right time in history with their twisted logic and unfortunately the case precedent thing makes this a thing that goes on for decades, even though that old ruling is now being applied to orders of magnitude more data on someone compared to the original case.

Until this changes just minimize or completely eliminate anything that can both record what you say or do and also send it to someone else's servers. Eventually all humans will have to fight for (I guess new) rights that can protect them against overzealous governments using advertising companies, surveillance powers and artificial intelligence against them. I think the 2020's will be the new 50's in terms of fighting for new rights and against government oppression. I don't expect this to go down very peacefully. It almost never does in such cases.